Thanks Jim.
I had tested if skirmishers in the same hex matter for fire and came to the result that they don't matter, I thought it's the same for melee but now after testing skirmishers in the same hex do matter for melee and so does their facing.
Another prove that the engine has some hidden qualities, but it gets complicated here as the skirmishers have no visible facing in the unitbox, one has to look closely how they are positioned in the 3D view.
I thought I put up some examples to show how much skirmishers matter:
1. French battalion in line gets attacked from the flank.
The Russian Guard battalion(A Moral) is 746 men strong and gets modified to 932 men because it's attacking in column. The additional modifier of 80% comes from 3 things:
A. Russian unit A quality gives +20%.
B. French get attack from a hex they are not facing. Russians get +40%.
C. Russian unit didn't fire and the French battalion can't fire at them even if it held its fire because the Russian aren't in their firing arc. That gives +20%.
- That sums up to +80% for the Russian attacking strength.
2. French battalion in line with skirmishers facing away from the enemy gets attacked from the flank.
The Russian Guard battalion(A Moral) is 746 men strong and gets modified to 932 men because it's attacking in column. The additional modifier of 60% comes from 2 things:
A. Russian unit A quality gives +20%.
B. French get attack from a hex they are not facing. Russians get +40%.
- Although the Russian unit held its fire the French skirmishers also didn't fire and by that negate the +20% as the French skirmishers are able to fire at the attacking Russians.
3. French battalion in line with skirmishers facing the enemy gets attacked from the flank.
The Russian Guard battalion(A Moral) is 746 men strong and gets modified to 932 men because it's attacking in column. The additional modifier of 20% comes only from 1 thing:
A. Russian unit A quality gives +20%.
Although the Russians attack from the flank the French skirmishers that are facing them negate the +40% bonus
Although the Russian unit held its fire the French skirmishers also didn't fire and by that negate the +20% as the French skirmishers are able to fire at the Russians.
So one can see that skirmishers can negate modifiers in the amount of 60%, that can be a big difference for a unit attacking from the flank.